A wheel alignment is a process that involves the adjustment of the wheels so that they are in proper angular position to the suspension and the ground that is important in control of the vehicle and minimization of tire wear. Camber, caster, and toe-in are the main angles that were measured in the given process as the last one is used to check the presence of the bent parts and can be adjusted at the rear. The process of aligning the wheels requires some delicate and usually costly tools and that is why a qualified technician must be used to ensure the proper alignment of the wheel. Learning the fundamentals of wheel alignment would assist in effective communication with the service provider. The inward angle of the wheels is called toe-in, in position the wheels are rolling parallel and the car with the zero toe-in has the same distance between the front and rear edges of the wheels. The toe-in is normally a few inches and is set through the tie-rod end on the front and a threaded toe-link on the rear. The tilt of the wheels relative to vertical is denoted by camber where a positive camber is a tilt outward and negative camber is a tilt inward, that influences the contact of the tires treads with the road. The camber angle is adjustable in degrees, not on the front, but on the rear on cam bolts. The tilt of the front steering axis, and has a positive caster (tilt towards the rear) and a negative caster (tilt towards the front); though it can be adjusted on the front (through substituting upper
Control Arm with offset bushings), it cannot be adjusted on the back.